HOTSPOT
Your network contains an Active Directory domain named contoso.com. The relevant
servers in the domain are configured as shown in the following table.
You plan to create a shared folder on Server1 named Share1. Share1 must only be
accessed by users who are using computers that are joined to the domain.
You need to identify which servers must be upgraded to support the requirements of Share1.
In the table below, identify which computers require an upgrade and which computers do not
require an upgrade. Make only one selection in each row. Each correct selection is worth
one point.
Answer: 
Question is missing information.
There is no need to upgrade from 2008 r2 if I only need to prevent outside users from accessing shared folders. Just configure permissions properly.
“who are using computers that are joined to the domain”
This isn’t about users though, it’s about users on domainjoined computers.